public AListStatisticTracker(Func <T, TSummary> selector, Func <TSummary[], TSummary> aggregator, TSummary emptyResult, AListBase <K, T> list = null)
{
_selector = selector;
_aggregator = aggregator;
_emptyResult = emptyResult;
list?.AddObserver(this);
}
public AListStatisticTracker(Func <T, TSummary> selector, Func <TSummary, TSummary, TSummary> aggregator, TSummary emptyResult, AListBase <K, T> list = null)
{
_selector = selector;
_emptyResult = emptyResult;
_aggregator = array => {
if (array.Length == 0)
{
return(_emptyResult);
}
var total = array[0];
for (int i = 1; i < array.Length; i++)
{
total = aggregator(total, array[i]);
}
return(total);
};
list?.AddObserver(this);
}
